Got x Get: Qual utilizar?

Hi


I didn't know where to look for, which one is correct, get or got in the following sentence:

Caso eu esteja falando com alguem

"a enfermeira tinha aconselhado ela a ligar pra gente de volta caso seus sintomas tivessem piorado, por isso ela esta ligando de volta"

"the nurse has adviced her to call us back in case her symptoms -------worse, that's why she is calling us back"


Obrigada